MIC910 Micrel MIC910 135MHz Low-Power SOT-23-5 Op Amp Final Information General Description Features The MIC910 is a high-speed, unity-gain stable operational amplifier. It provides a gain-bandwidth product of 135MHz with a very low, 2.4mA supply current, and features the tiny SOT-23-5 package. Supply voltage range is from ±2.5V to ±9V, allowing the MIC910 to be used in low-voltage circuits or applications requiring large dynamic range. The MIC910 is stable driving any capacitative load and achieves excellent PSRR, making it much easier to use than most conventional high-speed devices. Low supply voltage , low power consumption, and small packing make the MIC910 ideal for portable equipment. The ability to drive capacitative loads also makes it possible to drive long coaxial cables. • • • • • • 135MHz gain bandwidth product 2.4mA supply current Unconditionally unity-gain stable SOT-23-5 package 270V/µs slew rate drives any capacitive load Applications • • • • • Video Imaging Ultrasound Portable equipment Line drivers Ordering Information Pin Configuration IN+ 3 Part Number Junction Temp. Range Package MIC910BM5 –40°C to +85°C SOT-23-5 Functional Pinout V+ OUT 2 1 IN+ Part Identification 3 V+ OUT 2 1 A21 4 5 4 5 IN– V– IN– V– SOT-23-5 SOT-23-5 Pin Description Pin Number Pin Name Pin Function 1 OUT 2 V+ Positive Supply (Input) 3 IN+ Noninverting Input 4 IN– Inverting Input 5 V– Negative Supply (Input) Output: Amplifier Output Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com March 2001 1 MIC910 MIC910 Micrel Absolute Maximum Ratings (Note 1) Operating Ratings (Note 2) Supply Voltage (VV+ – VV–) ........................................... 20V Differentail Input Voltage (VIN+ – VIN–) .......... 8V, Note 4 Input Common-Mode Range (VIN+, VIN–) .......... VV+ to VV– Lead Temperature (soldering, 5 sec.) ....................... 260°C Storage Temperature (TS) ........................................ 150°C ESD Rating, Note 3 ................................................... 1.5kV Supply Voltage (VS) ....................................... ±2.5V to ±9V Junction Temperature (TJ) ......................... –40°C to +85°C Package Thermal Resistance ............................... 260°C/W Electrical Characteristics (±5V) VV+ = +5V, VV– = –5V, VCM = 0V, VOUT = 0V; RL = 10MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C; unless noted. Symbol Parameter VOS Typ Max Units Input Offset Voltage 1 15 mV VOS Input Offset Voltage Temperature Coefficient 4 IB Input Bias Current 3.5 5.5 9 µA µA IOS Input Offset Current 0.05 3 µA VCM Input Common-Mode Range CMRR > 60dB +3.25 V CMRR Common-Mode Rejection Ratio –2.5V < VCM < +2.5V 70 60 90 dB dB PSRR Power Supply Rejection Ratio ±5V < VS < ±9V 74 70 81 dB dB AVOL Large-Signal Voltage Gain RL = 2k, VOUT = ±2V 60 71 dB RL = 200Ω, VOUT = ±2V 60 71 dB +3.3 +3.0 3.5 V V VOUT Maximum Output Voltage Swing Condition Min positive, RL = 2kΩ –3.25 negative, RL = 2kΩ positive, RL = 200Ω –3.5 +3.0 +2.75 µV/°C –3.3 –3.0 3.2 negative, RL = 200Ω –2.8 V V V V –2.45 –2.2 V V GBW Gain-Bandwidth Product RL = 1kΩ 125 MHz BW –3dB Bandwidth AV = 1, RL = 100Ω 192 MHz SR Slew Rate 230 V/µs IGND Short-Circuit Output Current source 72 mA sink 25 mA IGND Supply Current 2.4 3.5 4.1 mA mA Electrical Characteristics VV+ = +9V, VV– = –9V, VCM = 0V, VOUT = 0V; RL = 10MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C; unless noted Symbol Parameter VOS Typ Max Units Input Offset Voltage 1 15 mV VOS Input Offset Voltage Temperature Coefficient 4 IB Input Bias Current 3.5 5.5 9 µA µA IOS Input Offset Current 0.05 3 µA MIC910 Condition Min 2 µV/°C March 2001 MIC910 Micrel Symbol Parameter Condition VCM Input Common-Mode Range CMRR > 60dB CMRR Common-Mode Rejection Ratio –6.5V < VCM < 6.5V 70 60 98 dB dB AVOL Large-Signal Voltage Gain RL = 2kΩ, VOUT = ±6V 60 73 dB VOUT Maximum Output Voltage Swing positive, RL = 2kΩ +7.2 +6.8 +7.4 V V GBW Gain-Bandwidth Product SR Slew Rate IGND Short-Circuit Output Current IGND Min Typ –7.25 Max Units +7.25 V negative, RL = 2kΩ –7.4 RL = 1kΩ 135 MHz 270 V/µs source 90 mA sink 32 mA Supply Current 2.5 –7.2 –6.8 V V 3.7 4.3 mA mA Note 1. Exceeding the absolute maximum rating may damage the device. Note 2. The device is not guaranteed to function outside its operating rating. Note 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. Note 4. Exceeding the maximum differential input voltage will damage the input stage and degrade performance (in particular, input bias current is likely to increase. Test Circuits VCC 10µF VCC 0.1µF 50Ω R2 BNC 5k Input 10µF 0.1µF 10k 10k 10k 2k 4 BNC MIC910 BNC 1 R1 5k Input 2 3 5 50Ω BNC 4 R7c 2k R7b 200Ω R7a 100Ω Output 2 0.1µF MIC910 1 BNC Output 3 5 0.1µF R6 0.1µF 5k R3 200k Input 50Ω All resistors: 1% metal film PSRR vs. Frequency 100pF 10pF R3 27k S1 S2 R5 20Ω R4 250Ω R2 R2 + R 5 + R4 VOUT = VERROR 1 + + R1 R7 10µF VEE R1 20Ω 10µF VEE All resistors 1% 0.1µF R5 5k R2 4k 4 CMRR vs. Frequency VCC 10µF 0.1µF 2 MIC910 1 3 5 BNC To Dynamic Analyzer 0.1µF R4 27k 10pF 10µF VEE Noise Measurement March 2001 3 MIC910 MIC910 Micrel Electrical Characteristics Supply Current vs. Temperature Supply Current vs. Supply Voltage +25°C 3 4 5 6 7 8 9 SUPPLY VOLTAGE (±V) 3.0 2.0 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) 10 2.0 1.0 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Offset Voltage vs. Common-Mode Voltage 5 OFFSET VOLTGE (mV) 6 4 VSUPPLY = ±5V 3 VSUPPLY = ±9V VSUPPLY = ±9V 1.5 Offset Voltage vs. Common-Mode Voltage 5 BIAS CURRENT (µA) VSUPPLY = ±5V 2.5 Bias Current vs. Temperature 2 VSUPPLY = ±9V VSUPPLY = ±5V VSUPPLY = ±9V 5 VSUPPLY = ±5V OFFSET VOLTGE (mV) 2.0 2 -40°C 3.5 OFFSET VOLTAGE (mV) SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) +85°C 2.5 2.5 4.0 3.5 3.0 Offset Voltage vs. Temperature 4 +85°C 3 -40°C 2 1 4 3 2 1 +25°C 0 -5 -4 -3 -2 -1 0 1 2 3 4 5 COMMON-MODE VOLTAGE (V) Short-Circuit Current vs. Temperature Short-Circuit Current vs. Temperature Short-Circuit Current vs. Supply Voltage -20 85 80 75 SOURCING CURRENT 70 65 VSUPPLY = ±5V 60 -25 VSUPPLY = ±5V -30 SINKING CURRENT -35 VSUPPLY = ±9V -40 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Short-Circuit Current vs. Supply Voltage OUTPUT VOLTAGE (V) 10 9 -20 -40°C -25 +85°C -30 -35 SINKING CURRENT +25°C 3 4 5 6 7 8 9 SUPPLY VOLTAGE (±V) 80 10 VSUPPLY = ±9V 8 7 6 5 +25°C 4 3 2 1 0 0 -40°C SOURCING CURRENT +85°C 20 40 60 80 100 OUTPUT CURRENT (mA) 4 -40°C +25°C 60 +85°C 40 SOURCING CURRENT 20 2 Output Voltage vs. Output Current -15 -40 2 100 OUTPUT CURRENT (mA) VSUPPLY = ±9V 3 4 5 6 7 8 9 SUPPLY VOLTAGE (±V) 10 Output Voltage vs. Output Current 0 -1 OUTPUT VOLTAGE (V) 90 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) +25°C 0 -8 -6 -4 -2 0 2 4 6 8 COMMON-MODE VOLTAGE (V) 55 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) OUTPUT CURRENT (mA) -40°C 1 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) 95 MIC910 +85°C -40°C -2 -3 -4 -5 SINKING CURRENT +85°C +25°C -6 -7 -8 -9 -10 -40 VSUPPLY = ±9V -30 -20 -10 OUTPUT CURRENT (mA) 0 March 2001 MIC910 Micrel +85°C -25 -20 -15 -10 -5 OUTPUT CURRENT (mA) 40 50 38 25 36 0 0 0 125 44 42 VSUPPLY = ±9V 75 40 50 38 25 36 GAIN BANDWIDTH (MHz) 46 34 200 400 600 800 1000 CAPACITIVE LOAD (pF) 54 120 125 52 100 100 50 75 48 50 46 25 44 20 42 10 0 3 4 5 6 7 8 9 SUPPLY VOLTAGE (±V) 34 200 400 600 800 1000 CAPACITIVE LOAD (pF) Common-Mode Rejection Ratio 150 0 2 42 75 Gain Bandwidth and Phase Margin vs. Supply Voltage 150 100 VSUPPLY = ±5V VSUPPLY = ±5V 80 60 40 VSUPPLY = ±9V 1x107 -4.5 -30 20 40 60 80 OUTPUT CURRENT (mA) PHASE MARGIN (°) GAIN BANDWIDTH (MHz) -3.5 -4.0 Gain Bandwidth and Phase Margin vs. Load 0 0 -3.0 100 1x102 0 0 SOURCING CURRENT +25°C 44 1x106 -40°C -2.5 CMRR (dB) +85°C 1.0 -2.0 PHASE MARGIN (°) 1.5 -1.5 125 1x105 2.0 -40°C 46 1x104 +25°C 2.5 -1.0 150 1x103 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 3.5 3.0 SINKING CURRENT -0.5 GAIN BANDWIDTH (MHz) VSUPPLY = ±5V 4.0 PHASE MARGIN (°) 0.0 4.5 0.5 Gain Bandwidth and Phase Margin vs. Load Output Voltage vs. Output Current Output Voltage vs. Output Current FREQUENCY (Hz) 40 VSUPPLY = ±9V VSUPPLY = ±9V 1x102 1x107 1x106 1x105 1x104 1x102 FREQUENCY (Hz) 40 0 1x103 1x107 1x106 1x105 1x104 0 60 20 20 1x103 1x102 0 60 1x107 20 80 1x106 VSUPPLY = ±5V 80 1x105 60 100 1x104 80 +PSRR (dB) CMRR (dB) 100 100 –PSRR (dB) 120 40 Negative Power Supply Rejection Ratio Positive Power Supply Rejection Ratio 1x103 Common-Mode Rejection Ratio FREQUENCY (Hz) FREQUENCY (Hz) Negative Power Supply Rejection Ratio 100 80 80 –PSRR (dB) 60 40 VSUPPLY = ±5V 20 40 VSUPPLY = ±5V 1x107 1x106 1x105 1x104 0 1x103 FREQUENCY (Hz) 1x107 1x106 1x105 1x104 20 1x103 1x102 0 60 1x102 +PSRR (dB) Positive Power Supply Rejection Ratio 100 FREQUENCY (Hz) March 2001 5 MIC910 MIC910 Micrel Closed-Loop Frequency Response 0.1µF FET probe 10 0 -10 -20 -30 -40 MIC910 CL -50 1 50Ω 225 180 RL=100Ω 30 20 GAIN (dB) GAIN (dB) 30 20 0p 10µF 50 40 1000pF 500pF 200pF 100pF 50pF 50 40 VCC RF Open-Loop Frequency Response 10 0 -50 1 10 100 200 FREQUENCY (MHz) 45 0 No Load -10 -20 -30 -40 VCC = ±2.5V 135 90 -45 -90 PHASE (°) Closed-Loop Frequency Response Test Circuit -135 -180 VCC = ±5V -225 10 100 200 FREQUENCY (MHz) 10µF VEE Open-Loop Frequency Response 10 0 -10 -20 -30 -40 -50 1 80 60 40 -45 -90 -135 -180 VCC = ±9V -225 10 100 200 FREQUENCY (MHz) 250 VCC = ±5V 200 150 100 50 0 0 1x105 1x104 1x101 1x103 20 45 0 No Load Negative Slew Rate SLEW RATE (V/µs) SLEW RATE (V/µs) 100 1x102 nV Hz NOISE VOLTAGE -50 1 10 100 200 FREQUENCY (MHz) 135 90 -10 -20 -30 -40 VCC = ±5V 250 120 0 10 0 Positive Slew Rate Voltage Noise 225 180 RL=100Ω 30 20 GAIN (dB) GAIN (dB) 30 20 0p 50 40 1000pF 500pF 200pF 100pF 50pF 50 40 PHASE (°) Closed-Loop Frequency Response 200 150 100 50 0 0 200 400 600 800 1000 LOAD CAPACITANCE (pF) VCC = ±5V 200 400 600 800 1000 LOAD CAPACITANCE (pF) FREQUENCY (Hz) Positive Slew Rate Current Noise 2 1 200 150 100 1x105 1x104 50 1x103 1x101 VCC = ±9V 0 0 250 SLEW RATE (V/µs) SLEW RATE (V/µs) 3 1x102 NOISE CURRENT pA Hz 300 250 4 0 Negative Slew Rate 300 5 VCC = ±9V 200 150 100 50 200 400 600 800 1000 LOAD CAPACITANCE (pF) 0 0 200 400 600 800 1000 LOAD CAPACITANCE (pF) FREQUENCY (Hz) MIC910 6 March 2001 MIC910 Micrel INPUT Small-Signal Pulse Response INPUT Small-Signal Pulse Response Small-Signal Pulse Response INPUT Small-Signal Pulse Response VCC = ±5V AV = 1 CL = 1000pF RL = 10MΩ OUTPUT VCC = ±9V AV = 1 CL = 1000pF RL = 10MΩ OUTPUT INPUT VCC = ±5V AV = 1 CL = 100pF RL = 10MΩ OUTPUT VCC = ±9V AV = 1 CL = 100pF RL = 10MΩ OUTPUT INPUT Small-Signal Pulse Response March 2001 VCC = ±5V AV = 1 CL = 1.7pF RL = 10MΩ OUTPUT VCC = ±9V AV = 1 CL = 1.7pF RL = 10MΩ OUTPUT INPUT Small-Signal Pulse Response 7 MIC910 MIC910 Micrel Large-Signal Pulse Response Large-Signal Pulse Response VCC = ±5V AV = 1 CL = 1.7pF OUTPUT OUTPUT VCC = ±9V AV = 1 CL = 1.7pF ∆V = 5.64V ∆t = 21ns Large-Signal Pulse Response VCC = ±5V AV = 1 CL = 100pF ∆V = 5.84V ∆t = 22.5ns OUTPUT OUTPUT Large-Signal Pulse Response ∆V = 5.68V ∆t = 24.5ns VCC = ±9V AV = 1 CL = 100pF Large-Signal Pulse Response ∆V = 5.84V ∆t = 26ns Large-Signal Pulse Response ∆V = 5.88V ∆t = 70ns OUTPUT OUTPUT VCC = ±5V AV = 1 CL = 1000pF VCC = ±9V AV = 1 CL = 1000pF MIC910 8 ∆V = 5.48V ∆t = 95ns March 2001 MIC910 Micrel Power Supply Bypassing Regular supply bypassing techniques are recommended. A 10µF capacitor in parallel with a 0.1µF capacitor on both the positive and negative supplies are ideal. For best performance all bypassing capacitors should be located as close to the op amp as possible and all capacitors should be low ESL (equivalent series inductance), ESR (equivalent series resistance). Surface-mount ceramic capacitors are ideal. Thermal Considerations The SOT-23-5 package, like all small packages, has a high thermal resistance. It is important to ensure the IC does not exceed the maximum operating junction (die) temperature of 85°C. The part can be operated up to the absolute maximum temperature rating of 125°C, but between 85°C and 125°C performance will degrade, in particular CMRR will reduce. A MIC910 with no load, dissipates power equal to the quiescent supply current * supply voltage Applications Information The MIC910 is a high-speed, voltage-feedback operational amplifier featuring very low supply current and excellent stability. This device is unity gain stable and capable of driving high capacitance loads. Driving High Capacitance The MIC910 is stable when driving any capacitance (see “Typical Characteristics: Gain Bandwidth and Phase Margin vs. Load Capacitance”) making it ideal for driving long coaxial cables or other high-capacitance loads. Phase margin remains constant as load capacitance is increased. Most high-speed op amps are only able to drive limited capacitance. Note: increasing load capacitance does reduce the speed of the device (see “Typical Characteristics: Gain Bandwidth and Phase Margin vs. Load”). In applications where the load capacitance reduces the speed of the op amp to an unacceptable level, the effect of the load capacitance can be reduced by adding a small resistor (<100Ω) in series with the output. Feedback Resistor Selection Conventional op amp gain configurations and resistor selection apply, the MIC910 is NOT a current feedback device. Resistor values in the range of 1k to 10k are recommended. Layout Considerations All high speed devices require careful PCB layout. The high stability and high PSRR of the MIC910 make this op amp easier to use than most, but the following guidelines should be observed: Capacitance, particularly on the two inputs pins will degrade performance; avoid large copper traces to the inputs. Keep the output signal away from the inputs and use a ground plane. It is important to ensure adequate supply bypassing capacitors are located close to the device. March 2001 ( ) PD(no load) = VV + − VV − IS When a load is added, the additional power is dissipated in the output stage of the op amp. The power dissipated in the device is a function of supply voltage, output voltage and output current. ( ) PD(output stage) = VV + − VOUT IOUT Total Power Dissipation = PD(no load) + PD(output stage) Ensure the total power dissipated in the device is no greater than the thermal capacity of the package. The SOT23-5 package has a thermal resistance of 260°C/W. Max . Allowable Power Dissipation = 9 TJ (max) − TA(max) 260W MIC910 MIC910 MIC910 Micrel 10 March 2001 MIC910 Micrel Package Information 1.90 (0.075) REF 0.95 (0.037) REF 1.75 (0.069) 1.50 (0.059) 3.00 (0.118) 2.60 (0.102) DIMENSIONS: MM (INCH) 3.02 (0.119) 2.80 (0.110) 0.50 (0.020) 0.35 (0.014) 1.30 (0.051) 0.90 (0.035) 0.20 (0.008) 0.09 (0.004) 10° 0° 0.15 (0.006) 0.00 (0.000) 0.60 (0.024) 0.10 (0.004) SOT-23-5 (M5) March 2001 11 MIC910 MIC910 Micrel MICREL INC. 1849 FORTUNE DRIVE TEL + 1 (408) 944-0800 FAX SAN JOSE, CA 95131 + 1 (408) 944-0970 WEB USA http://www.micrel.com This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. © 2001 Micrel Incorporated MIC910 12 March 2001